Microphone holder



FIG. 1 is a perspective view of microphone holder showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom view thereof, the undisclosed portion is not part of the claimed design;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a right side view thereof. 

The ornamental design for microphone holder, as shown and described 